﻿<Window x:Class="AppDemo.Window10"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window10" Height="300" Width="300">
    <Grid>
        <StackPanel>
            <ScrollViewer Height="80">
        <TextBox x:Name="aa" KeyUp="aa_KeyUp" TextWrapping="Wrap"></TextBox>
            </ScrollViewer>
            <Button Height="20" Click="Button_Click">xxx</Button>
           


        </StackPanel>
    </Grid>
</Window>
